@Dougmcintyre: exactly my thought. During the summer, temp control to zero, fall, winter, spring, to 9 o'clock. There's sometimes a light hesitation, but not the full grab.

BTW: @dkindig: how does one open the box to replace the foam tape?

My Z3 lacks heated mirrors, so I've gotten a pair of "mirror mitts" to cover them on frosty nights. The middle bottom section of my unheated driver's seat was strangely stiff when I bought the car last June (the passenger seat sections are quite flexible). Now it's cracking in several places, but it has nothing to do with the outside temperature. I've ordered a sheepskin panel (attaches at the seat bottom) to cover the offending section and provide more comfort on freezing mornings.